Thermal self-action effects for acoustic beams containing fronts in a Maxwell relaxing fluid

Open Physics ◽  
2014 ◽  
Vol 12 (5) ◽  
Author(s):  
Anna Perelomova
Keyword(s):  
Newtonian Fluid ◽  
The Self ◽  
Action Effects ◽  
Acoustic Beams ◽  
Sound Beams ◽  
Shock Fronts

AbstractThis paper examines the thermal self-action of acoustic beams in a Maxwell relaxing fluid. This type of thermal self-action differs from that in a Newtonian fluid and behaves differently depending on a ratio of sound period and time of thermodynamic relaxation. The self-action which relates to sound beams containing shock fronts is also discussed. In addition, stationary and non-stationary types of self-action are considered.

Thermal Self-Action of Acoustic Beams Containing Several Shock Fronts

2015 ◽  
Vol 40 (4) ◽  
pp. 539-546
Author(s):  
Anna Perelomova
Keyword(s):  
Shock Wave ◽  
Newtonian Fluid ◽  
Integer Number ◽  
Acoustic Beam ◽  
Single Shock ◽  
Sawtooth Wave ◽  
Self Focusing ◽  
Acoustic Beams ◽  
Shock Fronts

AbstractThermal self-action of an acoustic beam with one discontinuity or several shock fronts is studied in a Newtonian fluid. The stationary self-action of a single sawtooth wave with discontinuity (or some integer number of these waves), symmetric or asymmetric, is considered in the cases of self-focusing and self- defocusing media. The results are compared with the non-stationary thermal self-action of the periodic sound. Thermal self-action of a single shock wave which propagates with the various speeds is considered.

Self-action effects for wave beams containing shock fronts

2004 ◽  
Vol 174 (9) ◽  
pp. 973 ◽  
Author(s):  
Oleg V. Rudenko ◽  
Oleg A. Sapozhnikov
Keyword(s):  
Action Effects ◽  
Shock Fronts

The self in action effects: Selective attenuation of self-generated sounds

Cognition ◽  
2011 ◽  
Vol 121 (2) ◽  
pp. 207-218 ◽  
Author(s):  
Carmen Weiss ◽  
Arvid Herwig ◽  
Simone Schütz-Bosbach
Keyword(s):  
The Self ◽  
Action Effects

Self-action effects for wave beams containing shock fronts

2004 ◽  
Vol 47 (9) ◽  
pp. 907-922 ◽  
Author(s):  
Oleg V Rudenko ◽  
Oleg A Sapozhnikov
Keyword(s):  
Action Effects ◽  
Shock Fronts

EXPRESS: Your action does matter to me: examining the role of the co-actor’s action-effects in resolving the self-other discrimination problem

2021 ◽  
pp. 174702182110569
Author(s):  
Kévin Campos-Moinier ◽  
Lionel Brunel
Keyword(s):  
Spatial Location ◽  
Mechanistic Explanation ◽  
The Self ◽  
The Other ◽  
Stimulus Event ◽  
Temporal Dimension ◽  
Action Effects ◽  
Self And Other ◽  
Temporal Features ◽  
Event Information

Sharing a task with another person can introduce the need to discriminate representations that refer to our own action from that of the other person’s. The current understanding is that information about the stimulus event drives the self-other discrimination process, as it promotes (via the reactivation of feature codes) the representation that encodes the corresponding action. However, this mechanistic explanation relies on experimental situations in which stimulus event information (e.g., spatial location) is always, and directly available. Thus, it remains unclear whether, and how we could successfully discriminate between self- and other-related action representations in the absence of such information. The present study addressed this unanswered question using a novel joint Simon task-based paradigm. We report the results of three experiments in which we manipulated the availability of stimulus event information into the contralateral space. Our findings demonstrate that participants are able to compensate for the absence of stimulus event information by relying on temporal features of their co-actor’s action-effects (Experiment 1). Even more surprising was that participants continued to monitor the temporal features of their co-actor’s actions even when given a verbal signal by their co-actor (Experiments 2a), or full access to the common workspace (Experiment 2b). Our results are strong evidence that the representation of actions is not purely stimulus driven. They suggest that the temporal dimension of the other person’s actions is able to drive the self-other discrimination process, in the same way as other perceptual dimensions and feature codes that are shared with the stimulus event.

Statistical mechanics of the Burgers model of turbulence

1972 ◽  
Vol 55 (4) ◽  
pp. 659-675 ◽  
Author(s):  
Tomomasa Tatsumi ◽  
Shigeo Kida
Keyword(s):  
Exponential Distribution ◽  
Reynolds Numbers ◽  
Turbulent Energy ◽  
The Self ◽  
Dimensional Model ◽  
One Dimensional ◽  
Numerical Result ◽  
The Mean ◽  
Shock Fronts ◽  
Good Agreement

The velocity field of the Burgers one-dimensional model of turbulence at extremely large Reynolds numbers is expressed as a train of random triangular shock waves. For describing this field statistically the distributions of the intensity and the interval of the shock fronts are defined. The equations governing the distributions are derived taking into account the laws of motion of the shock fronts, and the self-preserving solutions are obtained. The number of shock fronts is found to decrease with time t as t−α, where α (0 [les ] α < 1) is the rate of collision, and consequently the mean interval increases as tα. The distribution of the intensity is shown to be the exponential distribution. The distribution of the interval varies with α, but it is proved that the maximum entropy is attained by the exponential distribution which corresponds to α = ½. For α = ½, the turbulent energy is shown to decay with time as t−1, in good agreement with the numerical result of Crow & Canavan (1970).

Problem behavior in autism spectrum disorders: A paradigmatic self-organized perspective of network structures

2019 ◽  
Vol 42 ◽  
Author(s):  
Lucio Tonello ◽  
Luca Giacobbi ◽  
Alberto Pettenon ◽  
Alessandro Scuotto ◽  
Massimo Cocchi ◽  
...  
Keyword(s):  
Autism Spectrum Disorder ◽  
Problem Behaviors ◽  
Autism Spectrum ◽  
The Self ◽  
Network Structures ◽  
Self Organized ◽  
Critical Equilibrium ◽  
Self Organized Criticality ◽  
Acute Agitation ◽  
Spectrum Disorders

AbstractAutism spectrum disorder (ASD) subjects can present temporary behaviors of acute agitation and aggressiveness, named problem behaviors. They have been shown to be consistent with the self-organized criticality (SOC), a model wherein occasionally occurring “catastrophic events” are necessary in order to maintain a self-organized “critical equilibrium.” The SOC can represent the psychopathology network structures and additionally suggests that they can be considered as self-organized systems.

The Nature of Rapidly Extracted Phycocyanin from the Blue-Green Alga Plectonema Boryanum

1971 ◽  
Vol 29 ◽  
pp. 366-367
Author(s):  
M. Kessel ◽  
R. MacColl
Keyword(s):  
Self Assembly ◽  
Analytical Ultracentrifugation ◽  
Uranyl Acetate ◽  
The Self ◽  
Major Protein ◽  
Subunit Structure ◽  
Blue Green Alga ◽  
Thin Sections ◽  
Blue Green Algae ◽  
Cacodylate Buffer

The major protein of the blue-green algae is the biliprotein, C-phycocyanin (Amax = 620 nm), which is presumed to exist in the cell in the form of distinct aggregates called phycobilisomes. The self-assembly of C-phycocyanin from monomer to hexamer has been extensively studied, but the proposed next step in the assembly of a phycobilisome, the formation of 19s subunits, is completely unknown. We have used electron microscopy and analytical ultracentrifugation in combination with a method for rapid and gentle extraction of phycocyanin to study its subunit structure and assembly.To establish the existence of phycobilisomes, cells of P. boryanum in the log phase of growth, growing at a light intensity of 200 foot candles, were fixed in 2% glutaraldehyde in 0.1M cacodylate buffer, pH 7.0, for 3 hours at 4°C. The cells were post-fixed in 1% OsO4 in the same buffer overnight. Material was stained for 1 hour in uranyl acetate (1%), dehydrated and embedded in araldite and examined in thin sections.

Interrelationship of the cellular distribution and secretion of regular structure (RS) protein in Bacillus licheniformis nm 105

1992 ◽  
Vol 50 (1) ◽  
pp. 712-713
Author(s):  
Xiaorong Zhu ◽  
Richard McVeigh ◽  
Bijan K. Ghosh
Keyword(s):  
Alkaline Phosphatase ◽  
Bacillus Licheniformis ◽  
Self Assembly ◽  
Gel Electrophoresis ◽  
Culture Supernatant ◽  
Regular Structure ◽  
The Self ◽  
Cellular Distribution ◽  
Structural Protein ◽  
Laboratory Cultures

A mutant of Bacillus licheniformis 749/C, NM 105 exhibits some notable properties, e.g., arrest of alkaline phosphatase secretion and overexpression and hypersecretion of RS protein. Although RS is known to be widely distributed in many microbes, it is rarely found, with a few exceptions, in laboratory cultures of microorganisms. RS protein is a structural protein and has the unusual properties to form aggregate. This characteristic may have been responsible for the self assembly of RS into regular tetragonal structures. Another uncommon characteristic of RS is that enhanced synthesis and secretion which occurs when the cells cease to grow. Assembled RS protein with a tetragonal structure is not seen inside cells at any stage of cell growth including cells in the stationary phase of growth. Gel electrophoresis of the culture supernatant shows a very large amount of RS protein in the stationary culture of the B. licheniformis. It seems, Therefore, that the RS protein is cotranslationally secreted and self assembled on the envelope surface.

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